Memory refers to the SDRAM (a kind of RAM) found on the Raspberry Pi.

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Remote restart after -bash: fork: Cannot allocate memory

I am running Raspbian on a Raspberry Pi which is located in a remote location. I use Putty to connect to it via SSH. I can connect fine but when I try to run any command I get the following: ...
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28 views

Largest micro sd card

What is the largest micro sd card that the Raspberry Pi 3 can handle? I have a 64 gb card that works flawlessly, but would like to try something larger.
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Why do I have so many RAM disks?

I have Arch Linux running on my Raspberry Pi 2. Right after install, I ran lsblk, fdisk and df commands (unfortunately I did not save the output) but I had one disk, which is the SD card and two ...
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38 views

What does libcofi do?

This answer rather vaguely states "libcofi-rpi.so is a hack to speed up certain memory operations." Apart from the fact that the file is called libcofi_rpi.so on my machine, what exactly is libcofi ? ...
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Direct memory access GPIO address manipulation

So we have a structure that is composed of pointers to the already mapped memory area. struct bcm2835_peripheral { int mem_fd;// "/dev/mem"s file descriptor void *map; //pointer to mapped ...
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783 views

Raspberry pi class 4 vs raspbery pi 2 class 10

I currently have the previous raspberry pi class 4 card. I'm considering getting the new raspberry pi model 2 class 10 card. Is there a speed difference between the two cards?
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3answers
235 views

Is 8gb enough to support Ubuntu MATE without storage issues?

After becoming familiar with Rasbian and Terminal, I decided to try something new with ubuntu MATE. Aside from the microSD card that the Raspberry pi came with, which I want to keep the Rasbian ...
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90 views

Can't install O/S from NOOBS

Preformatted 8GB micro SD card opens screen to install Raspbian, data partition, or boot from Scratch, but says I have 0 MB of 2762 MB needed, and offers no options to proceed. Where do I go from ...
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42 views

R-PI 2 data bus capaciy [closed]

I want to connect an external hard disk to a pi 2. So I need to know the maximum memory capacity a r-pi 2 can assess when I connect an external hard disk to its USB port. Or what is the size of its ...
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373 views

Freeing up cache when memory is low

I have my raspberry pi A+ in my embeeded project and every byte of memory is important when I've only got 128 MB to my CPU (I need 128 MB for the GPU because I use the camera module). Unfortunently ...
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54 views

Minimum gpu_mem on π2

The documentation claims, 16 MiB is the lower limit for the gpu memory size. When I set it to less than 32 MiB, start.elf won't run successfully. Everything I get is a repetitive four times blinking ...
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Segmentation fault caused by libmysqlclient.so or libcofi_rpi.so

Was getting a segmentation fault in a program that has traditionally run fine on most flavors of linux. Running ADB revealed that this seems to be caused by libmysqlclient.so using memcpy incorrectly, ...
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270 views

Is it possible to store data in Raspberry Pi?

I'm sorry if my question is very basic for some of you. I'm developping an application which is becoming complex. Currently I'm using Arduino. The application stores some data in the Microcontroler ...
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1answer
147 views

Would booting off of a USB hard drive increase the responsiveness of my Raspberry Pi 2?

I love the Raspberry Pi as a computing platform but sometimes I cannot stand the sluggish performance of the device. Occasionally when I'm browsing the internet or even trying to open the regular ...
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1answer
42 views

Raspberry Pi project with sound concatenation based on date/time and events [closed]

I'm thinking about making my first Raspberry Pi project and have some questions regarding what I will need to be able to complete this project. The end result should be a sound based machine with two ...
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1answer
48 views

Is there any way to limit data usage to xMB in sd card? [closed]

I am using an 8gb card but want to limit usage to 4gb, meaning I want to delete old files which cross the 4gb mark. Is there any way of achieving this?
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Where is the Raspberry Pi 512 MB memory located on the board?

Is the Raspberry Pi RAM located inside the Broadcom SoC or outside of it? If it's located outside, what's the peripheral responsible for accessing this memory?
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86 views

What's the smallest amount of memory that can be allocated to GPU?

According to http://elinux.org/RPiconfig#Memory , the minimum that can be specified in /boot/config.txt is 16MB. Is there a way to shut off video completely and allocate nothing? I'm asking about ...
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New PI 2 B+ unusably slow, CPU and RAM not being used?

Just setup a new R Pi 2B+, using raspbian on a 16gb sd card, ethernet, USB mouse/keyboard and HDMI out. Finding it extremely slow - the UI is reasonably responsive however installing monodevelop took ...
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32GB SD card displaying no memory [duplicate]

I've installed raspbmc using a 32gb class 10 SD card. By mistake I wipe the SD card clean. I did the same installing process and added the files to the SD but when it boots to install the available ...
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2k views

Available memory on Raspberry Pi 2 (missing 240 MB)

I just installed Raspbian (2015-01-31) on my brand new Raspberry Pi 2 with 1GB memory. But I'm puzzled when I run top I only get: KiB Mem: 762384 total. I've tried to set gpu_mem=16 in config.txt ...
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402 views

Pi running a midori fullscreen dashboard and wifi check cronjob keeps running out of memory

I have a Model B Raspberry Pi running the latest version of Raspbian, with all the packages up-to-date. It's fitted with a 32G SD card and its only purpose is to display a dashboard with some metrics. ...
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665 views

Can Compute Modules clustering and availability?

I am very interested in Compute Modules, but have a few concerns: The main press release (linked above) for Compute Modules states that these systems are "primarily designed for those who are going ...
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256 views

What is VideoCore MMU used for?

In RaspberryPI architecture (Broadcom BM2328 SoC), we can see that ARM core physical memory is mapped to VideoCore memory through a second MMU (the first maps ARM virtual to physical memory). What is ...
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133 views

What else can I do to maximize the RAM left for my application after all the services are started?

I'm configuring a new Rpi A+ with for headless processing. I'm currently running Pidora 2014. I have already minimized the GPU memory to 16 and switched to run level 3. After boot, I'm left with ...
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84 views

does the kernel.img file loaded at physical @ 0x00000000 or 0x00008000

on the final stage of the boot process of raspberry. The start.elf loads kernel.img which is the binary file containing the OS kernel and releases the reset on the CPU. I have two questions 1 does ...
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230 views

bad_alloc error

I get this error, when I login via SSH, to my pi, but it appears to be fully functioning. error pid:15354, boost::interprocess::bad_alloc 1) Is it to do with a memory problem? 2) Should I be ...
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339 views

shell creation report boost::interprocess::bad_alloc error

Always after running for a while, process creation reports an error that seems link to a memory allocation error. I says seems because the process is forked and works. For instance forking a shell ...
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132 views

Usage of graphics core for headless XRDP server

I run my Pi as a headless server, running (among others) XRDP. My question is this: does XRDP use the video core and RAM? If not what is the lowest possible memory split?
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436 views

Banana Pi memory bus clock speed [closed]

I hope this is not too off-topic but I think you are the people that may most likely got their hand on a Banana Pi board and can answer my question. What is the memory clock speed of the DDR3 RAM ...
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466 views

Why is there a difference in USB HDD speed in my two Raspberry Pis?

Summary USB drives connected to the rev2 running Raspbmc read/write twice as quickly as the rev1 running Raspbian. Why is there a difference in speed? Testing I tested the same external USB hard ...
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242 views

How to copy data from USB to RAM

I am trying to quickly download images from a USB digital camera to a hard drive disk attached by USB to my raspberry pi. I want to minimize the time the camera needs to be connected to the pi during ...
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179 views

Why does “free -h” show less total memory than assigned by splitting?

I have a static memory splitting (configured in config file and confirmed by vcgencmd) of arm=496M gpu=16M But when I run free -h I get total used free shared ...
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How to achieve gpu_mem=8?

I see some people claiming (see links) they have a memory splitting of gpu_mem=8, but I always thought 16/496 is the minimum split? Here is an answer on this very page: ...
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29k views

How to get remaining Memory in SD Card?

I have 16GB Sd card where I installed Rasbian using Win32 Disk Imager. After burning the image in windows OS it shows only around 40+ MB of free Space, Since Rasbian is image is around 2 GB where is ...
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212 views

Unlock 512 MB Ram Model B

I want to unlock the 512 MB RAM on my Raspberry PI. I have RASPMBC installed and followed http://hubcitylabs.org/unlocking-your-new-raspberry-pis-512mb-of-memory/ But it isnt working, I get error ...
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152 views

Real-Time Computaion! Processing Speed Problem!

I am pretty new to the c++ and raspberry pi. I am trying to run a real time sensor motor control with the help of Raspberry pi, using cpp. I am sniffing the sensor data through Ethernet and sending ...
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77 views

Raspberry pi memory

When you use a Raspberry Pi, the OS runs off of an SD card. Is anything being saved on the actual raspberry pi hardware when you remove the card? Said differently, say I create a password on a my RP ...
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651 views

What is the most optimum memory split for streaming pi's as security monitors which you will only ssh into?

I have a few model A's and model B's. I've also read about a few options that allow you to configure an arbitrary split apart from the 16, 32, 64, 128 (and 256 for the B). Any insight would be ...
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680 views

Set RAM split based on HDMI status on boot

For the most part, I run my Raspberry Pi headless (which requires very little VRAM). However, I occasionally plug in a monitor (usually after I mess up my SSH configuration). Is there a way to have ...
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13k views

Is it possible to install a larger RAM chip on the Raspberry Pi?

Can I upgrade the Raspbery Pi's RAM from 512 MB to 1 GB or 2 GB? I can't build a cpp-netlib in GCC 4.6 or 4.8 because the build consumes all 512 MB. I realize I can cross-compile, but I'm wondering ...
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490 views

Bus error with long running “cp” command

I'm copying about 800Gb of data between a samba share and a local usb attached ext4 hard drive. I'm about halfway through, and I've noticed that after a couple of hours of copying any command that I ...
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How to prevent Raspberry Pi memory allocation failure?

I have installed a Terraria server on my Raspberry Pi (Version B Revision 2) yesterday. I followed this tutorial on Reddit. I used the latest version of Raspbian provided by NOOBS: I just ...
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7k views

How to check what process is slowing down my RPi

I have a PHP scraper that is running on my RPi. I noticed that since I have installed some additional software to the RPi the scraper takes 3/4 times longer to finish it's task than before. I wonder ...
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1answer
353 views

Incorrect memory size

If I run free -h I see a total 121M listed and I have 16MB shared for video. The Raspberry Pi I'm using has a K4P2G324ED-AC1 chip and I expected to see something around 240M instead of 121M because ...
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2answers
271 views

Does my RPi uses video RAM for tunneling X over ssh?

I use my Pi in headless mode, and I like to use X over SSH occasionally to run graphics only apps like the Pi store, and a few of my programs. I'd like to increase my RAM by decreasing GPU RAM, in ...
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Memory Problem; I can make new files and install new software but can't download

I can make new files, folders and install new software but I can't download files from the internet (Using Iceweasel(Firefox) and Midori). When installing new software at some point it says something ...
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2answers
1k views

When does the OS kill an application?

I have an application which polls a bunch of servers every few minutes. To do this, it spawns one thread per server to poll (15 servers) and writes back the data to an object, however sometimes the ...
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6answers
26k views

Resize file system on OpenELEC

I was trying to perform an update and an error told me that I hadn't enough free space. So I connected to my Raspberry through SSH to ask for disk usage with: df -h And I obtained the following ...
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3answers
10k views

Required SD card capacity

I understand that Raspberry Pi boots from an SD card. What is the minimum amount of memory required by Raspberry Pi to run smoothly?